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Two countries each gain 2 million people. Country X begins with 20 million and Country Y with 100 million. Which has the higher growth rate?

Answer and explanation

Correct answer: Country X because the same increase is a larger share of its initial population

Growth rate measures increase relative to the starting population, not merely the number added. The same absolute increase can represent very different percentages when the initial populations differ. Country X starts with 20 million and gains 2 million, while Country Y starts with 100 million and gains the same 2 million.

For X, the rate is \(2\div20\times100=10\) percent. For Y, it is \(2\div100\times100=2\) percent. Therefore, Country X has the higher growth rate, so option C is correct. Country Y has the larger absolute population, but that fact alone does not give it the larger proportional growth.

Related tags

Absolute GrowthGrowth Rate ComparisonInitial PopulationPercentage GrowthPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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